The 150GPA is an ED apochromatic refractor introduced by Sky Rover Optics in 2020. The objective lens adopts a two-element air-spaced design, incorporating a  Super ED glass element to deliver excellent color correction. Benefiting from its long focal length, the 150GPA can achieve very good imaging performance with small-format CCD/CMOS sensors, even without the use of a field flattener. The rear section is equipped with a removable extension tube, making it convenient for binoviewer setups or other visual accessories. With its relatively long focal ratio, large aperture, and doublet objective design, the 150GPA delivers satisfying performance for both visual observation and astrophotography.